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EP 3 966 893 A1

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(43) Date of publication: 16.03.2022 Bulletin 2022/11 (21) Application number: 19787532.1 (22) Date of filing: 27.09.2019

(51) International Patent Classification (IPC):  H01Q 1/24(2006.01) G01S 7/06(2006.01) G01S 13/34(2006.01) H01Q 3/26(2006.01) G01S 7/02(2006.01) G01S 13/00(2006.01) G01S 13/42(2006.01) H01Q 3/40(2006.01) (52) Cooperative Patent Classification (CPC): H01Q 1/242; H01Q 3/2611; H01Q 3/2605; H01Q 3/40; G01S 11/02 (86) International application number: PCT/US2019/053654 (87) International publication number: WO 2021/061165 (01.04.2021 Gazette 2021/13)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (71) Applicant: Google LLC Mountain View, CA 94043 (US)	(72) Inventors: WANG, Jibing Mountain View, California 94043 (US) STAUFFER, Erik Richard Mountain View, California 94043 (US) AKRAM, Aamir Mountain View, California 94043 (US) (74) Representative: Cupitt, Philip Leslie  Marks & Clerk LLP Alpha Tower Suffolk Street Queensway Birmingham B1 1TT Birmingham B1 1TT (GB)